Method and apparatus for transmitting or receiving data and control information in wireless communication system

ABSTRACT

Disclosed is a method performed by a terminal in a wireless communication system, including receiving, from a base station, configuration information including a plurality of information elements for a time-frequency region, receiving control information from the base station, and cancelling a transmission of physical uplink shared channel (PUSCH) associated with a time-frequency region indicated by the control information, wherein the time-frequency region indicated by the control information is associated with at least one of the plurality of information elements included in the configuration information.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a Continuation Application of U.S. patentapplication Ser. No. 16/274,880, filed on Feb. 13, 2019, which is basedon and claims priority under 35 U.S.C. § 119 to Korean PatentApplication No. 10-2018-0017446, filed on Feb. 13, 2018, in the KoreanIntellectual Property Office, the disclosures of each of which areincorporated herein by reference in their entireties.

BACKGROUND 1) Field

The present disclosure relates generally to a wireless communicationsystem, and more particularly, to a method and an apparatus fortransmitting or receiving data information by a terminal in acommunication system.

2) Description of Related Art

To meet the demand for wireless data traffic having increased sincedeployment of fourth generation (4G) communication systems, efforts havebeen made to develop an improved fifth generation (5G) or pre-5Gcommunication system. Therefore, the 5G or pre-5G communication systemis also called a beyond 4G network or a post long term evolution (LTE)system. The 5G communication system is considered to be implemented inhigher frequency (millimeter wave (mmWave)) bands, e.g., 60 gigahertz(GHz) bands, so as to accomplish higher data rates. To decreasepropagation loss of radio waves and increase transmission distance,beamforming, massive multiple-input multiple-output (MIMO), fulldimensional MIMO (FD-MIMO), array antenna, analog beamforming, and largescale antenna techniques are being discussed in 5G communicationsystems. In addition, in 5G communication systems, development forsystem network improvement is underway based on advanced small cells,cloud radio access networks (RANs), ultra-dense networks,device-to-device (D2D) communication, wireless backhaul, moving network,cooperative communication, coordinated multi-points (CoMP),reception-end interference cancellation and the like. In the 5G system,hybrid frequency shift keying (FSK) and quadrature amplitude modulation(QAM) modulation (FQAM) and sliding window superposition coding (SWSC)as advanced coding modulation (ACM), and filter bank multi carrier(FBMC), non-orthogonal multiple access (NOMA), and sparse code multipleaccess (SCMA) as advanced access technologies have been developed.

The Internet, which is a human-centered connectivity network wherehumans generate and consume information, is now evolving to the Internetof Things (IoT) where distributed entities, such as things, exchange andprocess information without human intervention. The Internet ofEverything (IoE), which is a combination of IoT technology and Big Dataprocessing technology through connection with a cloud server, hasemerged. As technology elements, such as sensing technology,wired/wireless communication and network infrastructure, serviceinterface technology, and security technology have been demanded for IoTimplementation, a sensor network, machine-to-machine (M2M)communication, machine-type communication (MTC), and so forth haverecently been researched. Such an IoT environment may provideintelligent Internet technology services that create a new value tohuman life by collecting and analyzing data generated by connectedthings. The IoT may be applied to a variety of fields including smarthomes, smart buildings, smart cities, smart cars or connected cars,smart grids, health care, smart appliances and advanced medical servicesthrough convergence and combination between existing informationtechnology (IT) and various industrial applications.

Accordingly, various attempts have been made to apply 5G communicationsystems to IoT networks. For example, technologies such as a sensornetwork, MTC, and M2M communication may be implemented by beamforming,MIMO, and array antennas. Application of a cloud RAN as theabove-described Big Data processing technology is an example ofconvergence between 5G technology and IoT technology.

As described above, multiple services may be provided to a user in acommunication system, and in order to provide multiple services to auser, there is a need for a method of providing the services during thesame time period according to the characteristics of the services, andan apparatus for performing the same. Presently, various servicesprovided by a 5G communication system are being studied, and one of thevarious services is a service satisfying low-latency requirements.

SUMMARY

An aspect of the present disclosure provides a method and an apparatusfor simultaneously providing services of different types (or the sametype).

Another aspect of the present disclosure provides a method foradaptively supporting demodulation and decoding operations of a terminalaccording to the reception and detection of information by the terminalthrough a downlink control channel, and an apparatus for performingtime-difference-based adaptive decoding and demodulation operationsrelated to multiple channel transmissions/receptions which are performedby a terminal in order to support a particular service.

In accordance with an aspect of the present disclosure, a methodperformed by a terminal in a wireless communication system includesreceiving, from a base station, configuration information including aplurality of information elements for a time-frequency region, receivingcontrol information from the base station, and cancelling a transmissionof physical uplink shared channel (PUSCH) associated with atime-frequency region indicated by the control information, wherein thetime-frequency region indicated by the control information is associatedwith at least one of the plurality of information elements included inthe configuration information.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the present disclosure will be more apparent from thefollowing description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is an illustration of a basic structure of a time-frequencydomain, that is, a radio resource domain, in which data or controlinformation is transmitted in a downlink of an LTE system and a systemsimilar thereto;

FIG. 2 is an illustration of a basic structure of a time-frequencydomain, that is, a radio resource domain, in which data or controlinformation is transmitted in an uplink of an LTE system and a systemsimilar thereto;

FIG. 3 is an illustration of assigning a first data type, a second datatype, and a third data type, which are services considered in a 5G ornew radio (or next radio) (NR) system, in a frequency-time resource;

FIG. 4 is an illustration of assigning a first data type, a second datatype, and a third data type, which are services considered in a 5G or NRsystem, in a frequency-time resource;

FIG. 5 is an illustration of a method for receiving control informationand transmitting (or receiving) data by a terminal;

FIG. 6 is an illustration of configuring an interruption indicatoraccording to an embodiment;

FIG. 7 is an illustration of a terminal receiving interruptioninformation in a situation where the terminal is subjected tomultiple-slot scheduling according to an embodiment;

FIG. 8 is an illustration in which a periodic datatransmission/reception resource overlaps a resource indicated by aninterruption indicator in a situation where the periodic datatransmission/reception resource is configured for a terminal accordingto an embodiment;

FIG. 9 is a flowchart of a method of an operation of a terminalaccording to reception of interruption indicator information accordingto an embodiment;

FIG. 10 is a flowchart of a power control method of a terminal accordingto an embodiment;

FIG. 11 is a block diagram of a terminal of the present disclosure; and

FIG. 12 is a block diagram of a base station of the present disclosure.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present disclosure are described indetail with reference to the accompanying drawings.

In describing the embodiments of the present disclosure, a descriptionof technical contents which are well-known in the technical field towhich the present disclosure pertains but are not directly associatedwith the present disclosure is omitted. Such an omission of unnecessarydescriptions is intended to prevent obscuring the subject matter of thepresent disclosure and more clearly describe the subject matter thereof.

For the same reason, some elements are exaggerated, omitted, orschematically illustrated in the accompanying drawings. Further, thesize of each element may not reflect each element's actual size. In eachof the accompanying drawings, the same or corresponding elements aredenoted by the same reference numerals.

The advantages and features of the present disclosure and methods ofaccomplishing the same will be apparent by making reference to theembodiments described below in detail with reference to the accompanyingdrawings. However, the present disclosure is not intended to be limitedto the embodiments disclosed herein but may be implemented in variousdifferent forms. The following embodiments are provided only forcompleteness of the present disclosure and completely informing thoseskilled in the art of the scope of the present disclosure, but the scopeof the present disclosure is defined only by the appended claims andtheir equivalents. Throughout the present disclosure, the same or likereference numerals designate the same or like elements.

Here, it may be understood that each block of processing flowcharts andcombinations of the flowcharts may be performed by computer programinstructions. Since these computer program instructions may be mountedin processors for a general computer, a special-purpose computer, orother programmable data-processing apparatuses, these instructionsexecuted by the processors for the computer or the other programmabledata-processing apparatuses create means performing functions describedin block(s) of the flowcharts. Since these computer program instructionsmay also be stored in a computer-usable or non-transitorycomputer-readable memory of a computer or other programmabledata-processing apparatuses in order to implement the functions in acertain scheme, the computer program instructions stored in thecomputer-usable or non-transitory computer-readable memory may alsoproduce manufacturing articles including instruction means performingthe functions described in block(s) of the flowcharts. Since thecomputer program instructions may also be loaded into a computer orother programmable data-processing apparatuses, the instructions maycause a series of operational steps to be performed on the computer orother programmable data-processing apparatuses so as to generateprocesses executable by the computer and enable an operation of thecomputer or other programmable data-processing apparatuses, and may alsoprovide steps for implementing the functions described in the flowchartblock(s).

In addition, each block may indicate some of modules, segments, or codeincluding one or more executable instructions for executing a certainlogical function(s). Further, it is to be noted that the functionsmentioned in the blocks may occur out of order in some alternativeembodiments. For example, two blocks that are consecutively illustratedmay be performed substantially concurrently or may sometimes beperformed in the reverse order, according to corresponding functions.

Here, the term “unit” used may indicate software or hardware elementssuch as a field-programmable gate array (FPGA) and anapplication-specific integrated circuit (ASIC), where the unit mayperform any role. However, the term “unit” is not intended to be limitedto software or hardware. The term “unit” may indicate an entityconfigured to reside in a storage medium that may be addressed, and mayalso indicate an entity configured to reproduce one or more processors.Accordingly, for example, the term “unit” includes elements such assoftware elements, object-oriented software elements, class elements,and task elements; processors, functions, attributes, procedures,subroutines, segments of program code, drivers, firmware, microcode,circuits, data, databases, data structures, tables, arrays, andvariables. The functions provided in the elements and units may becombined with a smaller number of elements and units or may be furtherseparated into additional elements and units. In addition, the elementsand the units may also be implemented to reproduce one or more centralprocessing units (CPUs) within a device or a security multimedia card.Further, in some embodiments, the term “unit” may indicate an entitythat includes one or more processors.

A wireless communication system has been developed from a wirelesscommunication system providing a voice-centered service in the earlystage toward broadband wireless communication systems providinghigh-speed, high-quality packet data services compliant withcommunication standards, such as high-speed packet access (HSPA) and LTEor evolved universal terrestrial radio access (E-UTRA) of the thirdgeneration partnership project (3GPP), high-rate packet data (HRPD) andultra-mobile broadband (UMB) of 3GPP2, 802.16e of the Institute ofElectrical and Electronics Engineers (IEEE), and the like. In addition,the 5G or NR communication standards are being produced as the 5Gwireless communication system.

As described above, in wireless communication systems including 5G, atleast one service among enhanced mobile broadband (eMBB), massivemachine-type communications (mMTC), and ultra-reliable and low-latencycommunications (URLLC) may be provided to at least one terminal. Theabove-described services may be provided to the same terminal during thesame time period. In an embodiment, eMBB may be a service aiming athigh-speed transmission of high-capacity data, mMTC may be a serviceaiming at terminal power minimization and access of multiple terminals,and URLLC may be a service aiming at high reliability and low latency,but the present disclosure is not intended to be limited thereto. Thethree services may be a main scenario in an LTE system or a system suchas 5G and/or NR after the LTE system. In an embodiment, a description isprovided of a method for coexistence between eMBB and URLLC orcoexistence between mMTC and URLLC, and an apparatus using the same.

When a base station has scheduled, for any terminal, data correspondingto an eMBB service during a particular transmission time interval (TTI),if there occurs a situation where URLLC data must be transmitted duringthe TTI, a part of the eMBB data may not be transmitted in a frequencyband in which the eMBB data is already scheduled and transmitted, butthe generated URLLC data may be transmitted in the frequency band. Aterminal for which the eMBB data has been scheduled and a terminal forwhich the URLLC data has been scheduled may be identical or different.In the example, since there occurs a situation where a part of the eMBBdata having already been scheduled and transmitted is not actuallytransmitted, the possibility that the eMBB data will be corruptedbecomes higher. Accordingly, in the example, it is necessary todetermine a method for processing a received signal by the terminal forwhich the eMBB data has been scheduled or by the terminal for which theURLLC data has been scheduled, or a signal reception method thereof.Therefore, in an embodiment, a description is provided of a coexistencemethod between heterogeneous services for enabling transmission ofinformation according to each service when a partial or entire frequencyband is shared so as to schedule pieces of information (which mayinclude data and control information) according to eMBB and URLLC;simultaneously schedule pieces of information according to mMTC andURLLC; simultaneously schedule pieces of information according to mMTCand eMBB; or simultaneously schedule pieces of information according toeMBB, URLLC, and mMTC.

Hereinafter, embodiments are described in detail with reference to theaccompanying drawings. In the following description of the presentdisclosure, a detailed description of known functions or configurationsincorporated herein are omitted when the same may make the subjectmatter of the present disclosure unclear. The terms described below aredefined in consideration of the functions in the present disclosure, andmay be different according to the intention or practice of users andoperators. Therefore, the definitions of the terms should be made basedon the contents throughout the present disclosure.

Hereinafter, a base station is a main agent performing resourceallocation for a terminal, and may be at least one of a gNode B, aneNode B, a Node B, a base station (BS), a wireless access unit, a basestation controller, and a node on a network. A terminal may include auser equipment (UE), a mobile station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing acommunication function. In the present disclosure, a downlink (DL)indicates a radio transmission path of a signal transmitted from a basestation to a terminal, and an uplink (UL) indicates a radio transmissionpath of a signal transmitted from the terminal to the base station. Inaddition, an embodiment implemented based on an LTE or LTE-advanced(LTE-A) system is described below by way of example, but the presentdisclosure may be applied to other communication systems having asimilar technical background or channel form. For example, 5G mobilecommunication technology, developed after LTE-A may be included in othercommunication systems. Further, according to the determination of thoseskilled in the art, embodiments may be applied to other communicationsystems through partial modification without departing from the scope ofthe present disclosure.

As a representative example of broadband wireless communication systems,an LTE system (hereinafter, examples of the LTE system may include LTEand LTE-A systems) adopts an orthogonal frequency division multiplexing(OFDM) scheme in a downlink, and adopts a single carrier frequencydivision multiple access (SC-FDMA) scheme in an uplink. The term“uplink” refers to a radio link through which a terminal transmits dataor a control signal to a base station, and the term “downlink” refers toa radio link through which a base station transmits data or a controlsignal to a terminal. The above-described multiple access schemenormally allocates and operates time-frequency resources, which carrydata or control information to be transmitted according to users, so asto prevent the time-frequency resources from overlapping each other,that is, establish orthogonality, thus making it possible to distinguishthe data or control information of one user from another.

If a decoding failure occurs upon initial transmission, the LTE systemadopts a hybrid automatic repeat request (HARQ) scheme forretransmitting the relevant data in a physical layer. If a receiverfails to accurately decode data, the HARQ scheme enables the receiver totransmit, to a transmitter, information (negative acknowledgement(NACK)) providing notification of the decoding failure so that thetransmitter can retransmit the relevant data in the physical layer. Thereceiver combines the data retransmitted by the transmitter with thedata of which the decoding has failed, thereby increasing receptionperformance of the data. In addition, if the receiver accurately decodesthe data, information (acknowledgement (ACK)) providing notification ofdecoding success is transmitted to the transmitter so that thetransmitter may transmit new data.

FIG. 1 is an illustration of a basic structure of a time-frequencydomain, that is, a radio resource domain, in which data or controlinformation is transmitted in a downlink of an LTE system and a systemsimilar thereto.

Referring to FIG. 1, the horizontal axis represents the time domain andthe vertical axis represents the frequency domain. A minimumtransmission unit in the time domain is an OFDM symbol, in which oneslot 106 is configured by collecting N_(symb) OFDM symbols 102 and onesubframe 105 is configured by collecting two slots. The length of theslot is 0.5 ms and the length of the subframe is 1.0 ms. In addition, aradio frame 114 is a time domain unit which includes 10 subframes. Aminimum transmission unit in the frequency domain is a subcarrier, inwhich the entire system transmission bandwidth includes a total ofN_(BW) subcarriers 104. In this configuration, the specific values maybe variably applied.

A basic unit of resources in the time-frequency domain is a resourceelement (RE) 112, and may be represented by an OFDM symbol index and asubcarrier index. A resource block (RB) (or a physical resource block(PRB)) 108 may be defined by the N_(symb) consecutive OFDM symbols 102in the time domain and NR consecutive subcarriers 110 in the frequencydomain. Accordingly, in one slot, one RB 108 may include N_(symb)×N_(RB)REs 112. Generally, a minimum allocation unit of data in the frequencydomain is the RB unit. In the LTE system, generally, N_(symb)=7 andN_(RB)=12, and N_(BW) may be proportional to a bandwidth of the systemtransmission band. A data rate is increased in proportion to the numberof RBs scheduled for the terminal. The LTE system may define and operatesix transmission bandwidths. In an FDD system which operates thedownlink and uplink separated in the frequency domain, a downlinktransmission bandwidth and an uplink transmission bandwidth may bedifferent from each other. A channel bandwidth represents a radiofrequency (RF) bandwidth corresponding to the system transmissionbandwidth. Table 1 below shows a correspondence relationship between thesystem transmission bandwidth and a channel bandwidth that are definedin the LTE system. For example, in an LTE system having a channelbandwidth of 10 megahertz (MHz), a transmission bandwidth may include 50RBs.

TABLE 1 Channel bandwidth BW_(Channel) [MHz] 1.4 3 5 10 15 20Transmission 6 15 25 50 75 100 bandwidth configuration N_(RB)

Downlink control information may be transmitted within the first N OFDMsymbols within the subframe. In an embodiment, generally, N={1, 2, 3}.Accordingly, the value of N may be variably applied to each subframe,according to the amount of control information which must be transmittedin the current subframe. The control information to be transmitted mayinclude a control channel transmission section indicator indicating overhow many OFDM symbols the control information is transmitted, schedulinginformation on downlink data or uplink data, and information on HARQACK/NACK.

In the LTE system, scheduling information on downlink data or uplinkdata is delivered from a base station to a terminal through downlinkcontrol information (DCI). The DCI may be defined depending on variousformats. According to each format, the DCI may indicate whether the DCIis scheduling information (UL grant) on the uplink data or schedulinginformation (DL grant) on the downlink data, whether the DCI is acompact DCI having small-sized control information, whether to applyspatial multiplexing using multiple antennas, whether the DCI is a DCIfor power control, or the like. For example, DCI format 1, which is thescheduling control information (DL grant) on the downlink data, mayinclude at least one piece of information among the following pieces ofcontrol information.

-   -   Resource allocation type 0/1 flag: this indicates whether a        resource allocation scheme is type 0 or type 1. Type 0 applies a        bitmap scheme so as to allocate a resource in a resource block        group (RBG) unit. In the LTE system, a basic unit of scheduling        is an RB, represented by a time-frequency domain resource, and        an RBG includes multiple RBs, and thus becomes a basic unit of        scheduling in the type 0 scheme. Type 1 allocates a certain RB        within an RBG.    -   Resource block assignment: this indicates an RB allocated to        data transmission. The represented resource is determined        according to a system bandwidth and a resource allocation        scheme.    -   Modulation and coding scheme (MCS): this indicates a modulation        scheme used for data transmission and the size of a transport        block (TB), that is, data to be transmitted.    -   HARQ process number: this indicates a HARQ process number.    -   New data indicator: this indicates a HARQ initial transmission        or retransmission.    -   Redundancy version: this indicates a redundancy version of data        to be transmitted during transmission according to HARQ.    -   Transmit power control (TPC) command for a physical uplink        control channel (PUCCH): this indicates a transmit power control        command for a PUCCH that is an uplink control channel.

The DCI may pass through a channel coding and modulation process and maythen be transmitted through a physical downlink control channel (PDCCH)(or downlink control information transmitted through a PDCCH, which canbe used interchangeably therewith below) or an enhanced PDCCH (EPDCCH)(or downlink control information transmitted through an EPDCCH, whichcan be used interchangeably therewith below).

Generally, the DCI is independently scrambled with a particular RNTI(which may be understood as a terminal identifier or a terminal ID) foreach terminal so as to have a cyclic redundant check (CRC) bit addedthereto, is channel-coded, and is then configured of independent PDCCHbefore being transmitted. In the time domain, the PDCCH is mapped andthen transmitted during the control channel transmission section. Amapping location in the frequency domain of the PDCCH may be determinedbased on an identifier of each terminal and transmitted over the entiresystem transmission bandwidth.

The downlink data may be transmitted through a physical downlink sharedchannel (PDSCH) that is a physical channel for downlink datatransmission. The PDSCH may be transmitted after the control channeltransmission section, and scheduling information on a certain mappinglocation in the frequency domain, a modulation scheme, or the like maybe determined based on the DCI transmitted through the PDCCH.

By using the MCS among the pieces of control information constitutingthe DCI, a base station provides notification of a modulation schemeapplied to a PDSCH to be transmitted to a terminal and a size of data(transport block size (TBS)) to be transmitted. In an embodiment, theMCS may include 5 bits or more or less than 5 bits. The TBS correspondsto a size before channel coding for error correction is applied to dataTB to be transmitted by a base station.

Modulation schemes supported by LTE systems include quadrature phaseshift keying (QPSK), 16QAM, and 64QAM, of which modulation orders Qmscorrespond to 2, 4, and 6, respectively. That is, in the case of QPSKmodulation, 2 bits per symbol may be transmitted, in the case of the16QAM modulation, 4 bits per symbol may be transmitted, and in the caseof the 64QAM modulation, 6 bits per symbol may be transmitted. Inaddition, a modulation scheme above 256QAM may be used depending onsystem modification.

FIG. 2 is an illustration of a basic structure of a time-frequencydomain, that is, a radio resource domain, in which data or controlinformation is transmitted in an uplink of an LTE system and a systemsimilar thereto.

Referring to FIG. 2, the horizontal axis represents the time domain andthe vertical axis represents the frequency domain. A minimumtransmission unit in the time domain is an SC-FDMA symbol, and mayconfigure one slot 206 by collecting N_(symb) SC-FDMA symbols 202. Inaddition, one subframe 205 is configured by collecting two slots. Oneradio frame 214 is configured by collecting 10 subframes. A minimumtransmission unit in the frequency domain is a subcarrier, in which anentire system transmission bandwidth 204 includes a total of N_(BW)subcarriers 204. N_(BW) may have a value proportional to the systemtransmission bandwidth.

A basic unit of resources in the time-frequency domain is an RE 212, andmay be defined by an SC-FDMA symbol index and a subcarrier index. An RB208 may be defined by N_(symb) consecutive SC-FDMA symbols in the timedomain and N_(RB) consecutive subcarriers 210 in the frequency domain.Accordingly, one RB includes N_(symb)×N_(RB) REs. In general, a minimumtransmission unit of data or control information is an RB unit. A PUCCHis mapped to a frequency domain corresponding to one RB and transmittedin one subframe.

In the LTE system, it is possible to define a timing relationship of aPUCCH or a PUSCH, that is, an uplink physical channel, through which aHARQ ACK/NACK corresponding to a PDSCH as a physical channel fordownlink data transmission or a PDCCH or EPDDCH including asemi-persistent scheduling release (SPS release) is transmitted. Forexample, in an LTE system operating according to frequency divisionduplex (FDD), HARQ ACK/NACK corresponding to the PDSCH transmitted in ann−4-th subframe or PDCCH, or EPDCCH including the SPS release may betransmitted through the PUCCH or the PUSCH in an n-th subframe.

In the LTE system, a downlink HARQ adopts an asynchronous HARQ scheme inwhich a data retransmission time point is not fixed. That is, if, forinitial transmission data transmitted by the base station, the HARQ NACKis fed back from the terminal, the base station freely determines atransmission time point of data to be retransmitted on the basis of ascheduling operation. The terminal may perform buffering on datadetermined as an error as a result of decoding the received data for aHARQ operation, and then may perform combining with data to beretransmitted next.

If the terminal receives a PDSCH including downlink data transmittedfrom the base station in subframe n, the terminal transmits uplinkcontrol information including a HARQ ACK or a NACK of the downlink datato the base station through a PUCCH or PUSCH in subframe n+k. Forexample, k may be defined differently depending on whether the LTEsystem adopts FDD or time division duplex (TDD), and a UL/DL subframeconfiguration thereof. For example, in the case of an FDD LTE system, kis fixed to 4. In the case of a TDD LTE system, k may depend on asubframe configuration and a subframe number. In addition, when data istransmitted through multiple carriers, the value of k may be applieddifferently depending on a TDD configuration of each carrier.

In the LTE system, unlike a downlink HARQ, an uplink HARQ adopts asynchronous HARQ scheme in which a data transmission time point isfixed. That is, an uplink/downlink timing relationship of a physicaluplink shared channel (PUSCH), which is a physical channel for uplinkdata transmission, a PDCCH, which is a downlink control channelpreceding the PUSCH, and a physical hybrid indicator channel (PHICH),which is a physical channel through which a downlink HARQ ACK/NACKcorresponding to the PUSCH is transmitted, may be determined by thefollowing rules.

If, in the subframe n, the terminal receives a PDCCH including uplinkscheduling control information transmitted from the base station or aPHICH through which a downlink HARQ ACK/NACK is transmitted, theterminal transmits uplink data corresponding to the control informationthrough a PUSCH in subframe n+k. For example, k may be defineddifferently depending on whether the LTE system adopts FDD or TDD, and asubframe configuration thereof. For example, in the case of the FDD LTEsystem, k is fixed to 4. In the case of the TDD LTE system, k may dependon a subframe configuration and a subframe number. In addition, whendata is transmitted through multiple carriers, the value of k may beapplied differently depending on a TDD configuration of each carrier.

In addition, if the terminal receives a PHICH including informationrelated to the downlink HARQ ACK/NACK from the base station in subframei, the PHICH corresponds to a PUSCH that the terminal transmits insubframe i-k. For example, k may be defined differently depending on theFDD or the TDD of the LTE system and the subframe configuration thereof.For example, in the case of the FDD LTE system, k is fixed to 4. In thecase of the TDD LTE system, k may depend on the subframe configurationand the subframe number. In addition, when data is transmitted throughmultiple carriers, the value of k may be applied differently dependingon a TDD configuration of each carrier.

TABLE 2 Trans- Transmission scheme of mission DCI PDSCH corresponding tomode format Search Space PDCCH Mode 1 DCI Common and Single-antennaport, port 0 (see format 1A UE specific subclause 7.1.1) by C-RNTI DCIUE specific Single-antenna port, port 0 (see format 1 by C-RNTIsubclause 7.1.1) Mode 2 DCI Common and Transmit diversity (see subclauseformat 1A UE specific 7.1.2) by C-RNTI DCI UE specific Transmitdiversity (see subclause format 1 by C-RNTI 7.1.2) Mode 3 DCI Common andTransmit diversity (see subclause format 1A UE specific 7.1.2) by C-RNTIDCI UE specific Large delay CDD (see subclause format 2A by C-RNTI7.1.3) or Transmit diversity (see subclause 7.1.2) Mode 4 DCI Common andTransmit diversity (see subclause format 1A UE specific 7.1.2) by C-RNTIDCI UE specific Closed-loop spatial multiplexing format 2 by C-RNTI (seesubclause 7.1.4)or Transmit diversity (see subclause 7.1.2) Mode 5 DCICommon and Transmit diversity (see subclause format 1A UE specific7.1.2) by C-RNTI DCI UE specific Multi-user MIMO (see subclause format1D by C-RNTI 7.1.5) Mode 6 DCI Common and Transmit diversity (seesubclause format 1A UE specific 7.1.2) by C-RNTI DCI UE specificClosed-loop spatial multiplexing format 1B by C-RNTI (see subclause7.1.4) using a single transmission layer Mode 7 DCI Common and If thenumber of PBCH antenna format 1A UE specific ports is one,Single-antenna port, by C-RNTI port 0 is used (see subclause 7.1.1),otherwise Transmit diversity (see subclause 7.1.2) DCI UE specificSingle-antenna port, port 5 (see format 1 by C-RNTI subclause 7.1.1)Mode 8 DCI Common and If the number of PBCH antenna format 1A UEspecific ports is one, Single-antenna port, by C-RNTI port 0 is used(see subclause 7.1.1), otherwise Transmit diversity (see subclause7.1.2) DCI UE specific Dual layer transmission, port 7 format 2B byC-RNTI and 8 (see subclause 7.1.5A) or single-antenna port, port 7 or 8(see subclause 7.1.1)

Table 2 above describes supportable DCI format types according to eachtransmission mode in conditions configured by C-RNTI included in 3GPP TS36.213. A terminal performs search and decoding on the assumption that arelevant DCI format exists in a control space section according to apre-configured transmission mode. For example, when the terminalreceives transmission mode 8 as an indication, the terminal searches fora DCI format 1A in a common search space and a UE-specific search space,and searches for a DCI format 2B only in the UE-specific search space.

The description of the wireless communication system has been made withreference to the LTE system, but the present disclosure is not limitedto the LTE system, and, thus, may be applied to various wirelesscommunication systems, including NR, 5G, and the like. In addition, inan embodiment, when applied to another wireless communication system,the above-described value of k may be changed and applied even to asystem using a modulation scheme corresponding to FDD.

FIGS. 3 and 4 are illustrations of assigning a first data type, a seconddata type, and a third data type, which are services considered in a 5Gor NR system, in a frequency-time resource.

Referring to FIG. 3, a first-type data 301, a second-type data 303, 305,and 307, and a third-type data 309 are assigned in an entire systemfrequency band 300. If second-type data 303, 305, and 307 are generatedand need to be transmitted while first-type data 301 and third-type data309 are assigned and transmitted in a particular frequency band, atransmitter may empty the part in which the first-type data 301 and thethird-type data 309 are already assigned, or may transmit thesecond-type data 303, 305, and 307 without transmitting the part inwhich the first-type data 301 and the third-type data 309 are alreadyassigned. Since the second-type data 303, 305, and 307 among theservices must reduce a delay time, the second-type data 303, 305, and307 may be allocated a part of a resource allocated to the first-typedata 301, and may then be transmitted. If the second-type data 303, 305,and 307 is additionally allocated to a resource allocated to thefirst-type data 301 and is transmitted on the allocated resource, thefirst-type data 301 may not be transmitted on an overlappingfrequency-time resource, and, thus, the transmission performance of thefirst-type data 301 may become lower. That is, for example, due to theassignment of the second-type data 303, 305, and 307, a transmissionfailure of the first-type data 301 may occur.

For example, the first-type data 301 may correspond to eMBB, thesecond-type data 303, 305, and 307 may correspond to URLLC, and thethird-type data 309 may correspond to mMTC.

Referring to FIG. 4, an entire system frequency band 400 may be dividedinto sub-bands 402, 404, and 406, and each sub-band may be used totransmit a service and data. Information related to the sub-bandconfiguration may be predetermined, and a base station may transmit therelated information to a terminal through higher signaling.Alternatively, the information related to the sub-band configuration maybe arbitrarily determined by the base station or a network node, andservice may be provided without transmitting separate sub-bandconfiguration information to the terminal. FIG. 4 illustrates a case inwhich a sub-band 402 is used to transmit first-type data 408, a sub-band404 is used to transmit second-type data 410, 412, and 414, and asub-band 406 is used to transmit third-type data 416.

In the present disclosure, the length of a TTI used to transmit thesecond-type data 410, 412, and 414 may be less than that of a TTI usedto transmit the first-type data 408 or third-type data 416. In addition,a transmitter may transmit a response of information related to thesecond-type data 410, 412, and 414 faster than in the case oftransmission of a response of information related to the first-type data408 or third-type data 416, and, thus, may transmit or receiveinformation with low latency.

A first-type data service described below is referred to as a first-typeservice and data for a first-type service is referred to as first-typedata. The first-type service or the first-type data is not limited toeMBB, but may also correspond to a case in which high-rate datatransmission is required or broadband transmission is performed. Inaddition, a second-type data service is referred to as a second-typeservice and data for a second-type service is referred to as asecond-type data. The second-type service or the second-type data is notlimited to URLLC, but may also be correspond to a case in which a shortdelay time is required or high-reliability transmission is needed, ormay correspond to even another system which requires not only a shortdelay time but also high reliability. Further, a third-type data serviceis referred to as a third-type service and data for a third-type serviceis referred to as third-type data. The third-type service or thethird-type data is not limited to mMTC, but may also correspond to acase in which a low speed, wide coverage, low power, or the like isrequired. In addition, when an embodiment is described, the first-typeservice may be understood as including the third-type service or notincluding the same.

Structures of physical layer channels used according to the respectivetypes in order to transmit the three kinds of services or data may bedifferent. For example, there may be a difference in at least one of thelength of one OFDM or discrete Fourier transform-spread-OFDM(DFT-S-OFDM) symbol, the length of a TTI, an allocation unit offrequency resources, a structure of a control channel, and a method formapping data.

In the above-described configuration, the three types of services andthe three types of data have been described, but more types of servicesand data corresponding to the service types may exist, and the presentdisclosure may be applied to such examples.

In the present disclosure, the terms “physical channel” and “signal” inthe conventional LTE or LTE-A system may be used. However, the contentsof the present disclosure may be applied to a wireless communicationsystem other than the LTE and LTE-A systems.

As described above, the 5G system requires a method for satisfying amaximum delay time. Specifically, when a base station allocates uplinkor downlink data resources to a terminal supporting an eMBB service,there may occur a situation where, before performing actualtransmission, the base station must reallocate the allocated resourcesfor terminals supporting a URLLC service which requires a delay timeless than that of the eMBB service. In the case of a downlink, the basestation may selectively operate data assignment andtransmission/reception, for terminals supporting a URLLC service eitherbefore or after allocation of the relevant resources. However, in thecase of an uplink, if separate signaling for terminals supporting theeMBB service does not exists, a terminal may transmit data to a basestation on a pre-allocated uplink resource, and thus, the datatransmitted by the terminal supporting the eMBB service interferes, fromthe perspective of the base station, with data transmitted by a terminalthat supports the URLLC service and is allocated an uplink resourcewhich is the same as, or partially overlaps, the pre-allocated uplinkresource. Therefore, it is necessary to appropriately deal with thisinterference.

The present disclosure may be applied to FDD and TDD systems.

Hereinafter, higher signaling is a signal delivery method for deliveringinformation from a base station to a terminal through a downlink datachannel of a physical layer, or delivering information from a terminalto a base station through an uplink data channel of the physical layer,and may be radio resource control (RRC) signaling, packet dataconvergence protocol (PDCP) signaling, or a medium access control (MAC)control element (MAC CE).

In the present disclosure, a terminal may be a receiver and a basestation may be a transmitter on a downlink channel, and a terminal maybe a transmitter and a base station may be a receiver on an uplinkchannel. In addition, a downlink control channel in the presentdisclosure may correspond to at least one of a cell-common downlinkcontrol channel, a UE-common downlink control channel, and a UE-specificdownlink control channel. In addition, downlink control information inthe present disclosure may correspond to at least one piece ofinformation among cell-common downlink control information, UE-commondownlink control information, and UE-specific downlink controlinformation. Further, higher signaling in the present disclosure maycorrespond to at least one of cell-common higher signaling andUE-specific higher signaling.

In the present disclosure, the downlink control, data information,and/or channel may also be sufficiently applied to uplink channelcontrol, data information, and/or channel.

FIG. 5 is an illustration of a method for receiving control informationand transmitting (or receiving) data by a terminal.

Referring to FIG. 5, the terminal may receive, on a downlink controlchannel 500, information indicating which resource domain corresponds toa resource 504 on which uplink transmission (or downlink reception)cannot be performed in a pre-configured frequency resource domainsection 508 and a pre-configured time resource domain section 506through a downlink control information search. The informationindicating which resource corresponds to a resource on which uplinktransmission cannot be performed may indicate at least a part of aresource 502 defined by the pre-configured frequency resource domainsection 508 and time resource domain section 506. The downlink controlinformation may include a CRC bit scrambled with a separate RNTIdifferent from a cell RNTI (C-RNTI), a paging RNTI (P-RNTI), a systeminformation RNTI (SI-RNTI), and the like.

The above-described control information may be located in a resourcepreceding the resource 502 defined by the pre-configured frequencyresource domain section 508 and time resource domain section 506. Thecontrol information may indicate a part of the predefined resource 502which is adjacent to a control information resource (which is closest onthe time axis after the control information resource). Alternatively,the control information may indicate a part of a predefined resourcewhich is adjacent to the next control information resource inconsideration of a processing time, and which part of a predefinedresource is indicated by the control information may be configured byhigher signaling or L1 signaling.

The frequency resource domain section 508 may be identical to an uplinkbandwidth part (BWP) pre-configured for the terminal, or may beconfigured by separate higher signaling. In the example, the frequencyresource domain section 508 may include a start point and an end pointthereof, a start point and the length of a resource domain; and thelike. As illustrated in FIG. 5, the predefined resource 502 may have onefrequency resource domain section, or may be configured to have at leasttwo frequency resource domain sections. A unit of frequency resourcedomain section may be an RB unit or an RB group unit related to areference subcarrier interval pre-configured for the terminal.

The time resource domain section 506 may be identical to, or differentfrom, the length of a cycle of the control channel 500 through which theterminal monitors the downlink control information. In the example, astart point of the time resource domain section may correspond to astart symbol value or an end symbol value of a downlink control channeldomain in which the downlink control information is transmitted, or maycorrespond to a symbol value immediately after the end of the downlinkcontrol channel domain. An end point of the time resource domainsection, which may be indicated by the interruption information, maycorrespond to a symbol value immediately before the start of, or asymbol value immediately before the end of, a downlink control channeldomain in which the next interruption information may be transmitted, ormay correspond to a symbol value immediately before the end of adownlink control domain. Alternatively, the end point of the timeresource domain section may be started or finished at any time pointbetween control channel resources that the terminal needs to monitor.Specifically, the time resource domain section 506 may be configuredusing one, two, or four slot lengths according to a particularsubcarrier interval and a particular cyclic-prefix configuration, andother values are possible. In addition, as illustrated in FIG. 5, thepredefined resource 502 may have one time resource domain section, ormay have multiple non-consecutively configured time resource domains.

Although there exists an uplink transmission resource or a downlinkreception resource pre-configured for the terminal in the resourcedomain 504 indicated by the downlink control information receivedthrough the UE-specific or UE-common downlink control channel 500, theterminal does not transmit data in the uplink or does not receive datain the downlink (or does not expect to transmit data in the uplink orreceive data in the downlink, or cancels or drops uplink datatransmission) in a relevant time resource domain (or a time resource andfrequency resource domain). That is, the terminal may receive downlinkdata or transmit uplink data (or may expect to receive downlink data ortransmit uplink data) only in a resource domain in which the resourcedomain 504 does not overlap the time resource domain or the time andfrequency resource domain. This operation may be identically applied todownlink control information and uplink control information.

For example, if data is transmitted only in the remaining resourcedomain except an overlapping resource domain, it is possible to performpuncturing or rate matching in a data-mapping scheme. A puncturingscheme (all of time or time and frequency resources) is a scheme fortransmitting or receiving data except bits belonging to an overlappingresource domain. A rate-matching scheme is a scheme for re-mapping datato a non-overlapping resource domain and then transmitting or receivingthe relevant data. It is possible to separately configure which schemeis to be used among the rate matching scheme and the puncturing scheme,by higher signaling or L1 signaling (which may be downlink controlinformation), or one scheme among the schemes may always be applied.Alternatively, the rate matching or the puncturing scheme may beimplicitly applied, and which scheme is to be used may be determineddepending on a ratio of an allocated data resource (all of time or timeand frequency resources) to an overlapping resource domain, a timedifference between a time point at which data is received through thecontrol channel 500 and a time point at which data is actually receivedor transmitted, a minimum processing time required by a terminal, a datatype, or the like.

Alternatively, the terminal, which receives configuration of a resource(for data transmission) at least partially overlapping the resourcedomain 504 in the time resource domain or the time and frequencyresource domain, may not expect to use the relevant configured resource(data transmission in the case of an uplink resource or data receptionin the case of a downlink resource).

In the present disclosure, control information transmitted through thedownlink control channel 500 may be referred to as a URLLC preemptionindicator, an (uplink or downlink) interruption indicator (which can beinterchangeably used with interruption indicator information orinterruption information), a transmission or reception stop indicator,or the like, and may be referred to by other terms.

When the terminal receives and identifies relevant indicator informationbefore actually transmitting or receiving a signal, or whiletransmitting or receiving a signal, on a resource in relation to all ofthe downlink or uplink resources granted to the terminal such asdownlink data, uplink data, or an uplink control channel transmissionpre-scheduled for the terminal, the above-described indicator serves toindicate, to the terminal, that the terminal expects not to transmit orreceive data in a physical channel resource domain part (or a physicalchannel resource domain part overlapping a time and frequency resourcedomain) which temporally overlaps a resource domain indicated by therelevant indicator information. Alternatively, when the terminalreceives and identifies relevant indicator information before actuallytransmitting or receiving a signal, or while transmitting or receiving asignal, on a resource in relation to all of the downlink or uplinkresources granted to the terminal such as downlink data, uplink data, oran uplink control channel transmission pre-scheduled for the terminal,the indicator serves to indicate, to the terminal, that the terminalexpects not to transmit or receive all transport blocks (or a grantedresource domain) including a physical channel resource domain part (or aphysical channel resource domain part overlapping a time and frequencyresource domain) which only temporally overlaps a resource domainindicated by the relevant indicator information. Alternatively, when theterminal receives the indicator information indicating resourceinformation on a resource, which does not overlap an uplink or downlinkresource domain previously scheduled (or granted) for the terminal bythe base station, and identifies the resource information, the terminalmay transmit uplink data or may receive downlink data in the resourcedomain previously scheduled for the terminal (or may expect to transmituplink data or receive downlink data).

In the case of downlink data reception or uplink data transmission, ifdata transmission/reception is not performed according to the controlinformation, the base station may subsequently again provide a grant tothe terminal through a downlink control channel, and may transmit orreceive data, which has not been transmitted or received, through thisconfiguration. However, uplink control information is not transmitted onthe basis of this grant. Therefore, when uplink control information istransmitted or piggybacks on an uplink data channel and is thentransmitted thereon, if transmission/reception of control informationhas not been performed according to the control information, the basestation may again provide a grant, which requests uplink controlinformation, to the terminal in the relevant resource domain.Alternatively, without a grant, the terminal may transmit the controlinformation, which has not been transmitted by the terminal, to the basestation in a delayed resource domain previously determined (configured)by higher signaling.

The control information may be transmitted through a UE-specific controlchannel, a UE-group-common control channel, or a control channel sharedby all of the terminals. In addition, the control information may beconfigured while a bandwidth period is configured, and may be configuredfor each carrier (or cell). In addition, the control information maysimultaneously include information on multiple carriers. For example,first interruption indicator information on a first carrier and secondinterruption indicator information on a second carrier may be includedin the same control information and may then be transmitted. Thisconfiguration may be a method applicable to a terminal configured toperform cross-carrier scheduling.

FIG. 6 is an illustration of configuring an interruption indicator.

Referring to FIG. 6, a first scheme 602 is a method for providing onlytime resource information by using interruption indicator information.An indicator may include information indicating whether to stoptransmission/reception in a particular time resource domain (e.g., asymbol group including one symbol or multiple (consecutive ornon-consecutive) symbols) 604 according to a bitmap scheme with respectto a pre-configured time resource domain section 606 and apre-configured frequency resource domain section 608. Time resourcedomain sections indicated by respective bits included in a bitmap mayall have the same size, or may be configured to have a one- (or two-)symbol difference. For example, each bit may indicate one symbol, twosymbols, or four symbols, and the specific number of symbols may change.In addition, the number of symbols indicated by the last bit may change.Alternatively, the number of symbols indicated by the last bit may bedetermined based on a relationship between a time resource domain lengthT and a size n of interruption indicator information of one carrier.That is, one bit constituting the indicator information may indicateinterruption information on [T/n] consecutive symbols 604, or mayindicate interruption information on [T/n] consecutive symbols 604. Forexample, the first to (n−1)-th bits may indicate [T/n] or [T/n] symbols,and the n-th bit may indicate T−(n−1) [T/n] or T−(n−1) [T/n] symbols.

A second scheme 612 is a method for providing time and frequencyresource information by using interruption indicator information. Anindicator may include information indicating whether to stoptransmission/reception in a particular time resource domain (e.g., asymbol group including one symbol or multiple (consecutive ornon-consecutive) symbols) and a particular frequency resource domain(e.g., a value configured in a (consecutive or non-consecutive) PRBgroup unit or a value obtained by dividing, by n, a frequency resourcedomain section 620 identical to, or different from, a pre-configuredbandwidth frequency period) with respect to a pre-configured timeresource domain section 616 and a pre-configured frequency resourcedomain section 620. That is, a resource may be divided into a latticestructure as indicated by reference numeral 622, and thus, one bit mayprovide information on a resource configured using a time and frequencyresource domain. In addition, a bit indicating time resource informationmay differ from a bit indicating frequency resource information. Forexample, interruption indicator information may be configured such thata bit indicating a time resource and a bit indicating frequency resourceinformation are adjacent to each other, and the order, in which the bitindicating a time resource and the bit indicating frequency resourceinformation are arranged, may be changed.

Time resource domain sections indicated by respective bits may all havethe same size, or may be configured to have a one- (or two or more-)symbol difference. Alternatively, the configuration of time resourcedomain sections indicated by respective bits may be determined based ona relationship between a time resource domain length T 616 and a size nor n/2 of interruption indicator information of one carrier. That is,one bit constituting the indicator information may indicate interruptioninformation on [T/n] consecutive symbols 604, or may indicateinterruption information on [T/n] consecutive symbols 604. If timeresource information is indicated by n bits, in the example, the firstto (n−1)-th bits may indicate [T/n] or [T/n] symbols, and the n-th bitmay indicate T−(n−1) [T/n] or T−(n−1) [T/n] symbols. Alternatively, if nis the total number of bits configured for an interruption indicator,“a” is the total number of symbols included in one slot, and T is thetotal number of symbols related to time resource domains which may beindicated by an interruption indicator, each of a (T−[T/a]×a) number ofbits among n bits may indicate [T/a] or [T/n] symbols, and each of an(n−T+[T/a]×a) number of bits, which are the remaining bits, may indicate[T/a] or [T/n] symbols. The order of the bits may be changed so that abit indicating a smaller number of symbols may be arranged first.

Frequency resource domain sections indicated by respective bits may allhave the same size, or may be configured to have a one- (or two ormore-) RB difference. Alternatively, each of the frequency resourcedomain sections may have a value obtained by dividing a frequencyresource domain size F 620 by 2 (or n). For example, in FIG. 6, 618 isthe size of a frequency resource domain which may be indicated by onebitmap, and may become [F/2] or [F/2]. To further generalize, if afrequency domain is divided into n parts, the first to (n−1)-th bitsamong n bits indicating a frequency resource may indicate [F/n] or [F/n]RBs, and the n-th bit may indicate T−(n−1) [F/n] or T−(n−1) [F/n] RBs.

For example, if n is the total number of bits configured for aninterruption indicator, “a” is a value obtained by dividing by 2 thetotal number of symbols included in one slot, and T is the total numberof symbols related to time resource domains which may be indicated by aninterruption indicator (here, n and “a” are both considered to be evennumbers), each of a (T−[T/a]×a) number of bits in relation to a firstceiling function [F/2] or first floor function [F/2] frequency sectionamong first n/2 bits in a time and frequency resource domain sectionindicated by each bit may indicate [T/a] or [T/n] symbols, and each ofan (n/2−T+[T/a]×a) number of bits, which are the remaining bits, mayindicate [T/a] or [T/n] symbols. In addition, a (T−[T/a]×a) number ofbits, which are the first bits, in relation to the remaining ceilingfunction [F/2] or remaining floor function [F/2] frequency sectionsamong the remaining n/2 bits may indicate [T/a] or [T/n] symbols, and an(n/2−T+[T/a]×a) number of bits, which are the remaining bits, mayindicate [T/a] or [T/n] symbols. Although n and “a” are odd numbers, asimilar scheme may be easily applied and used.

A unit of T may be a symbol unit or a symbol group unit. A unit of F maybe an RB unit or an RB group unit.

For example, the scheme to be applied among the first and second schemesmay be configured by higher signaling, or may be adaptively indicated byL1 signaling including higher signaling. Pieces of information accordingto the two schemes may have the same bit size or may have different bitsizes. In FIG. 6, consideration is given to a case in which the piecesof information according to the two schemes both have 14 bitmaps perbandwidth period per particular carrier. If the time resource domain 606or 616 corresponds to one symbol including 14 symbols and the frequencyresource domain 608 or 620 is identical to the frequency bandwidthperiod, according to the first scheme, one bit may indicate interruptioninformation on one symbol in relation to the frequency bandwidth periodconfigured for the terminal. According to the second scheme, one bit mayindicate interruption information on two consecutive symbols among thebisected domains (or a domain after being corrected using a ceilingfunction [F/2] (or a floor function [F/2])) in relation to the frequencybandwidth period configured for the terminal.

The terminal may receive configuration of whether a search forinterruption information is made, using higher signaling. Controlinformation including the interruption information may include CRCinformation scrambled with a particular RNTI. It is possible toconfigure, using higher signaling, a resource domain in which therelevant interruption information is transmitted, set information ofparticular cells, information providing notification of how the relevantinterruption information is associated with a particular cell(interruption indicator information may include interruption informationon multiple cells, and in this configuration, information indicatingwhich cell's interruption information is included in the interruptionindicator information), size information or search cycle information ofinterruption information, information on a time and frequencyconfiguration indicated by a bit included in interruption information,or combination information of the above-described pieces of information.

When the terminal receives the relevant interruption information, inonly the overlapping part of a time resource domain or the overlappingpart of a time and frequency resource domain, which is indicated by therelevant interruption information in a scheduled resource domain, theterminal may not perform uplink data transmission (or controlinformation transmission) in the case of uplink scheduling, or may notperform downlink data reception in the case of downlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation, in an entire scheduled resource domain (or a resourcedomain allocated a particular TB) including the at least partiallyoverlapping part of a time resource domain or the at least partiallyoverlapping part of a time and frequency resource domain, which isindicated by the relevant interruption information in a scheduledresource domain, the terminal may not perform uplink data transmission(or control information transmission) in the case of uplink scheduling,or may not perform downlink data reception in the case of downlinkscheduling.

Alternatively, when the terminal receives the relevant interruptioninformation, in a slot including the at least partially overlapping partof a time resource domain or the at least partially overlapping part ofa time and frequency resource domain, which is indicated by the relevantinterruption information, the terminal may not perform uplink datatransmission (or control information transmission) in the case of uplinkscheduling, or may not perform downlink data reception in the case ofdownlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation in a situation where repeated transmission or multiplemulti-slot transmissions are scheduled for the terminal, in a slotincluding the at least partially overlapping part of a time resourcedomain or the at least partially overlapping part of a time andfrequency resource domain, which is indicated by the relevantinterruption information, the terminal may not perform uplink datatransmission (or control information transmission) in the case of uplinkscheduling, or may not perform downlink data reception in the case ofdownlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation in a situation where repeated transmission or multiplemulti-slot transmissions are scheduled for the terminal, if there existsa scheduled slot including the at least partially overlapping part of atime resource domain or the at least partially overlapping part of atime and frequency resource domain, which is indicated by the relevantinterruption information, in an entire slot for which the repeatedtransmission is scheduled, the terminal may not perform uplink datatransmission (or control information transmission) in the case of uplinkscheduling, or may not perform downlink data reception in the case ofdownlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation in a situation where repeated transmission or multiplemulti-slot transmissions are scheduled for the terminal, if there existsa scheduled slot including the at least partially overlapping part of atime resource domain or the at least partially overlapping part of atime and frequency resource domain, which is indicated by the relevantinterruption information, in the slot (and all of the following slotsfor which the same control information is scheduled), the terminal maynot perform uplink data transmission (or control informationtransmission) in the case of uplink scheduling, or may not performdownlink data reception in the case of downlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation in a situation where repeated transmission is scheduled forthe terminal, if there exists a slot including the at least partiallyoverlapping part of a time resource domain or the at least partiallyoverlapping part of a time and frequency resource domain, which isindicated by the relevant interruption information, wherein the slot isa slot in which data transmission according to a particular RV value(e.g., 0 or 3) is performed, the terminal may not perform uplink datatransmission in the case of uplink scheduling, or may not performdownlink data reception in the case of downlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation in a situation where repeated transmission is scheduled forthe terminal, if there exists a slot including the at least partiallyoverlapping part of a time resource domain or the at least partiallyoverlapping part of a time and frequency resource domain, which isindicated by the relevant interruption information, wherein the slot isthe first slot in scheduling for the repeated transmission, the terminalmay not perform uplink data transmission (or control informationtransmission) in all of the slots, for which the repeated transmissionis scheduled, in the case of uplink scheduling, or may not performdownlink data reception in all of the slots, for which the repeatedtransmission is scheduled, in the case of downlink scheduling.

Alternatively, when the terminal receives the relevant interruptioninformation in a situation where repeated transmission is scheduled forthe terminal, the terminal may not perform downlink data reception oruplink data transmission only in a slot (or a particular transmissioninterval) including the at least partially overlapping part of a timeresource domain or the at least partially overlapping part of a time andfrequency resource domain, which is indicated by the relevantinterruption information.

FIG. 7 is an illustration in which a terminal receives interruptioninformation in a situation where the terminal is subjected tomultiple-slot scheduling.

Referring to FIG. 7, the terminal may receive, as one piece of controlinformation, scheduling for one or at least two slots 704 through aUE-common or UE-specific control channel. Allocation of a time resourcedomain to the at least two configured slots is identical. That is, ifuplink data is transmitted only in second to seventh symbols in a firstslot, uplink data may be transmitted only in second to seventh symbolsin a second slot. That is, if the terminal is subjected tomulti-scheduling for N (in FIG. 7, N is 4) or more consecutive ornon-consecutive slots, downlink data time resource domains or uplinkdata time resource domains respectively allocated to the relevantscheduled slots 708 may all be identical from the perspective of asymbol index. Multiple-slot scheduled frequency resource domain sections712 are illustrated as being all identical, but frequency resourcedomain sections of the respective slots may be different from eachother. In addition, multi-scheduled time resource domain sections 710are illustrated as being continuous, but may be discontinuouslyallocated from the perspective of time resources.

The terminal receives interruption indicator information through acontrol channel 702, and a resource domain 706 indicated by the relevantinterruption indicator information overlaps a partial resource domain ofa second slot in a resource domain pre-scheduled for the terminal. Forexample, the terminal may not transmit or receive only a TB allocated tothe relevant overlapping second slot (or may expect not to transmit orreceive only a TB). Alternatively, if code-block-group-basedretransmission is configured by higher signaling, the terminal mayreceive or transmit data on remaining resources except a physicalchannel resource domain in which time resources overlap each other (ortime and frequency resources overlap each other) in a resource domainindicated by an interruption indicator. In addition, the terminal maynot transmit or receive all TBs (or may expect not to transmit orreceive all TBs) allocated to the relevant overlapping second slot andthe following slots scheduled by the same control information as that ofthe second slot. That is, the terminal may not transmit or receive datain the second slot, the third slot, and the fourth slot. Alternatively,the terminal may not transmit or receive all TBs (or may expect not totransmit or receive all TBs) allocated to the relevant overlappingsecond slot and all of the slots scheduled by the same controlinformation as that of the second slot. That is, the terminal may nottransmit or receive data in the first to fourth slots.

FIG. 8 is a view illustrating an example in which a periodic datatransmission/reception resource overlaps a resource indicated by aninterruption indicator in a situation where the periodic datatransmission/reception resource is configured for a terminal.

Referring to FIG. 8, the terminal may be allocated a resource on whichthe terminal may perform transmission or reception and which isperiodically configured by L1 signaling, higher signaling, or acombination thereof. An example of a periodic uplink resource maycorrespond to a grant-free resource, an SPS resource, or a periodic SRStransmission. When a grant-free resource is configured for the terminal,the terminal may use the relevant resource only if uplink data to betransmitted exists. In addition, the terminal may perform SRStransmission on a periodically-configured uplink resource in order toestimate an uplink channel. An example of a periodic downlink resourcemay correspond to an SPS resource or periodic channel state informationreference signal (periodic CSI-RS) transmission. The terminal mayreceive data on a relevant periodic SPS resource, or may estimate adownlink channel through a periodic CSI-RS. Sizes 814 of individual timeresource sections of the periodically-configured uplink or downlinkresource domain may be configured to be all identical to, or differentfrom, each other. Individual frequency resource sections 812 of theperiodically-configured uplink or downlink resource domain may beconfigured to be all identical to, or different from, each other. Inaddition, a size 816 of the relevant periodic uplink or downlinkresource sections may be configured or indicated by L1 signaling orhigher signaling.

The terminal receives interruption indicator information through adownlink control channel 802, and if a resource domain 818 indicated bythe relevant interruption indicator information at least partiallyoverlaps a resource domain 806 pre-configured by RRC or L1 signaling,the terminal does not perform uplink data transmission, downlink datareception, reference signal transmission for uplink channel measurement,or reference signal reception for downlink channel measurement (or doesnot expect to perform them), which can be transmitted in the relevantoverlapping resource domain.

If a periodically-configured resource is a grant-free uplink datatransmission resource, the terminal receives interruption indicatorinformation. If a resource domain 818 indicated by the relevantinterruption indicator information at least partially overlaps thegrant-free uplink data transmission resource domain 806 according torepeated transmission interval configuration, the terminal may transmitor may not transmit uplink data in other resource domains 804, 808, and810, configured to perform repeated transmission, in addition to therelevant resource domain. A determination of whether the relevant datahas been transmitted may be based on an RV value. In addition, forexample, size 816 may signify the value of a cycle during which repeatedtransmission can be performed.

For example, if an RV value of uplink data according to grant-freeuplink data transmission resources is set to {0, 0, 0, 0}, data itself,transmitted on each transmission resource, includes decodableinformation. Therefore, in the example, although a partial resourcedomain of at least one of uplink resource domains, in which repeatedtransmission can be performed, at least partially overlaps a resourcedomain indicated by the interruption indicator information, the terminalmay perform repeated transmission on the remaining non-overlappingresources. That is, the terminal may transmit uplink data in resourcedomains 804, 808, and 810. However, if an RV value of uplink dataaccording to grant-free uplink data transmission resources is set to {0,3, 1, 2}, data themselves respectively corresponding to the remainingvalues except 0 and 3 do not include decodable information. Therefore,if the resource domain indicated by the interruption indicatorinformation overlaps a part of an uplink resource domain in which datacorresponding to an RV value of 0 or 3 is transmitted, the terminal maynot perform the entire relevant configured repeated transmission (or mayexpect not to perform the same). Instead, the terminal may considertransmission of data to be transmitted during the next repeatedtransmission.

FIG. 9 is a flowchart of an operation of a terminal according toreception of interruption indicator information.

Referring to FIG. 9, in step 902, the terminal first receivesinterruption indicator information on a pre-configured UE-group-commoncontrol channel resource, and identifies a resource domain indicated bythe relevant interruption indicator information. In step 904, theterminal determines whether condition A or B is satisfied, byconsidering an uplink or downlink resource domain scheduled for theterminal itself and a resource domain indicated by the interruptionindicator information. If condition A is satisfied, in step 906, theterminal performs operation A.

Condition A may be one of the following conditions or a combination ofat least two thereof.

1. If a resource domain indicated by interruption indicator informationat least partially overlaps, from the perspective of time, a scheduleduplink or downlink resource domain

2. If a resource domain indicated by interruption indicator informationat least partially overlaps, from the perspective of time and frequency,a scheduled uplink or downlink resource domain

3. If at least some of repeated (or multi-) transmission scheduledresource domains at least partially overlap, from the perspective oftime, a resource domain indicated by interruption indicator information

4. If at least some of repeated (or multi-) transmission scheduledresource domains at least partially overlap, from the perspective oftime and frequency, a resource domain indicated by interruptionindicator information

Operation A may be one of the following operations or a combination ofat least two thereof.

1. Data is transmitted or received in the remaining resource domainexcept a part overlapping a resource domain indicated by interruptionindicator information

2. If a resource is a transmission resource (an uplink resource) and awaveform applied to the relevant transmission is DFT-S-OFDM, data (orcontrol information) is transmitted in the remaining resource domainexcept a resource domain at least partially and temporally overlapping aresource domain indicated by interruption indicator information

3. If a resource is a transmission resource and a waveform applied tothe relevant transmission is OFDM, data (or control information) istransmitted in the remaining resource domain except a resource domain atleast partially and temporally (or from the perspective of a combinationof time and frequency) overlapping a resource domain indicated byinterruption indicator information

4. A transport block to be transmitted or received is not transmitted orreceived in an at least partially overlapping data resource domain in aresource domain and a time domain (or a time and frequency domain)indicated by interruption indicator information

5. A code block (or a code block group) to be transmitted or received isnot transmitted or received in an at least partially overlapping dataresource domain in a resource domain and a time domain (or a time andfrequency domain) indicated by interruption indicator information

6. Uplink control information (UCI) applied to an at least partiallyoverlapping control channel resource domain is not transmitted orreceived in a resource domain and a time domain (or a time and frequencydomain) indicated by interruption indicator information

If condition B is satisfied, in step 908, the terminal performsoperation B.

Condition B may be one of the following conditions.

1. If a resource domain indicated by interruption indicator informationdoes not overlap, from the perspective of time, a scheduled uplink ordownlink resource domain

Operation B may be one of the following operations.

1. Data (or control information) is transmitted or received in apre-configured resource domain

In the present disclosure, data or control information of which uplinkor downlink transmission/reception has been configured may be used for afirst-type service and/or a third-type service. In addition, a resourcedomain indicated by interruption indicator information may be used for asecond-type service, but the present disclosure is not limited thereto.

FIG. 10 is a flowchart of a power control method of a terminal.

Referring to FIG. 10, in step 1002, the terminal receives information onuplink transmission configuration. An example of uplink transmission maycorrespond to uplink data transmission, control informationtransmission, or random access information transmission. In addition,uplink transmission configuration information may include uplink dataresource allocation information for uplink data transmission. Then, instep 1004, if multiple uplink transmissions allocated for a particulartime exist, the terminal determines a priority between the multipletransmissions.

Generally, control information transmission (i.e., transmission in acase where UCI piggybacks on PUCCH transmission and a PUSCH) isdetermined to have a higher priority than that of data transmission(i.e., PUSCH transmission), but if data transmission is performed for aURLLC service or a service sensitive to a delay time, data transmissionaccording to such a service needs to be determined to have a higherpriority. Below, a method for determining a priority between datatransmission and control information transmission according to a URLLCservice or a service sensitive to a delay time is described.

If two PUSCH resources overlap at a particular time point (a symbol orslot unit), the terminal may determine a priority between the two PUSCHsbased on DCI, which indicates scheduling to each of the two PUSCHs, andan RNTI used to scramble a CRC attached to the DCI. The two PUSCHsources in one slot do not overlap from the perspective of a symbol, butmay overlap from the perspective of a slot, and thus, the overlappingmay refer to the latter case. That is, the overlapping from theperspective of a slot may signify a case in which overlapping does notoccur to absolute time when each PUSCH is transmitted in a slot but twoPUSCHs exist in one slot. Alternatively, if even at least one symboloverlaps in time resources on which two PUSCHs are transmitted, theterminal may determine that the PUSCH resources overlap each other fromthe perspective of a symbol. That is, the overlapping from theperspective of a symbol may signify a case in which overlapping occurs,from the perspective of absolute time, to the time when two PUSCHs aretransmitted.

The terminal may assign a higher priority to uplink data transmissionscheduled by control information including a CRC bit scrambled with anRNTI (e.g., which may be referred to as a URLLC-RNTI, a special C-RNTI,or a URLLC-RNTI) for supporting a URLLC service or a service sensitiveto a delay time than that of uplink data transmission scheduled bycontrol information including a CRC bit scrambled with a C-RNTI.

Specifically, the terminal may first assign transmission power to aPUSCH through which uplink data scheduled by control informationincluding a CRC bit scrambled with a URLLC-RNTI is transmitted, and ifthe other remaining power exists, the terminal may allocate the same toa PUSCH through which uplink data scheduled by control informationincluding a CRC scrambled with a C-RNTI is transmitted.

Alternatively, if a PUSCH resource, on which uplink data scheduled bycontrol information including a CRC bit scrambled with a C-RNTI istransmitted, and a PUCCH resource, which includes HARQ-ACK feedbackinformation on downlink data scheduled by control information includinga CRC bit scrambled with a URLLC-RNTI, overlap each other from theperspective of a slot or symbol, the terminal may discard the PUSCHresource (or may not perform PUSCH transmission, or may drop PUSCHtransmission). That is, the terminal may transmit UCI informationincluding HARQ-ACK feedback information on the pre-indicated PUCCHresource, without causing the UCI information including the HARQ-ACKfeedback information piggybacking on a PUSCH resource.

Alternatively, if a PUCCH resource (or a PUCCH resource includingchannel measurement result feedback reporting on CSI-RS measurement),which includes HARQ-ACK feedback information on downlink datatransmission scheduled by control information including a CRC bitscrambled with a C-RNTI, and a PUSCH resource, which includes uplinkdata scheduled by control information including a CRC bit scrambled witha URLLC-RNTI, overlap each other (from the perspective of a slot orsymbol), the terminal may prioritize the PUSCH resource. That is, theterminal may not map UCI information, included in a PUCCH resource, tothe PUSCH resource according to a piggyback scheme. If it is possible tosimultaneously transmit a PUCCH and a PUSCH, the terminal may firstallocate power to the PUSCH according to a priority thereof, and mayallocate the remaining power to the PUCCH. If it is impossible tosimultaneously transmit a PUCCH and a PUSCH, the terminal may drop PUCCHtransmission and may transmit only the PUSCH. For example, the terminalmay separately receive a grant from the base station so as to retransmitthe non-transmitted PUCCH, or may perform PUCCH resource transmission ina resource domain implicitly configured by higher signaling without agrant. That is, in relation to at least two overlapping PUSCHtransmissions, the terminal may determine which PUSCH is to be allocatedpower first, on the basis of DCI which issues instructions to each PUSCHand an RNTI scrambled with a CRC bit attached to the DCI. In addition,in relation to at least two overlapping PUCCH transmissions, theterminal may determine which PUCCH is to be allocated power first, onthe basis of DCI which issues instructions to each PUCCH and an RNTIscrambled with a CRC bit attached to the DCI.

A method for determining a priority between transmissions on the basisof a URLLC-RNTI is described above, but it is also possible to determinea priority between transmissions based on the length of the DCI. Thelength of the DCI may be determined based on a DCI format or the lengthof information bits before channel coding. There is a high possibilitythat the DCI for a URLLC service or a service sensitive to a delay timemay have a short length for quick processing. Therefore, uplink datatransmission using DCI having a short length of information bits may bedetermined to have a higher priority.

A method for determining a priority between transmissions on the basisof a URLLC-RNTI is described above, but it is possible to determine apriority between transmissions based on configuration information for acontrol resource set (CORESET) on which DCI is transmitted. An exampleof the configuration information for a CORESET may correspond to amonitoring cycle of a CORESET, the size of a frequency or time resourcedomain of a CORESET, a demodulation reference signal (DMRS) transmissionscheme (e.g., a broadband DMRS transmission scheme or a narrowband DMRStransmission scheme) applied to a CORESET, a frequency domain section inwhich a CORESET is transmitted, a value of numerology configurationapplied to a CORESET, or the like. If the above-described configurationinformation for a CORESET on which the DCI that schedules uplink data istransmitted differs from configuration information for another CORESETwith respect to at least one item, the difference may be determined tobe configuration information for the DCI for a URLLC service or aservice sensitive to a delay time.

Further, it is possible to determine a priority between transmissionsthrough a time point at which the DCI is detected through a CORESET. Forexample, if uplink transmission resources indicate at time point “a” andat time point “b” after time point “a” at least partially overlap eachother, the terminal may determine that an uplink transmission resource,indicated at time point “b” at which data is finally received, has ahigher priority. The above-described priority determination methods maybe applied as a combination of one or more thereof when a priority isdetermination, and if multiple criteria are applied, the methods may beapplied in a predetermined order.

In step 1006, the terminal performs power control of an uplink resourcedomain by considering the above-described priorities, and performsuplink transmission. Alternatively, the terminal performs uplinktransmission by considering the above-described priorities.

FIG. 11 is a block diagram of a terminal 1000.

Referring to FIG. 11, the terminal 1100 may include a terminal receiver1101, a terminal transmitter 1104, and a terminal processor 1102. Theterminal receiver 1101 and the terminal transmitter 1104 may becollectively referred to as a transceiver. The transceiver may beconfigured to transmit or receive a signal to or from a base station.The signal may include control information and data. Accordingly, thetransceiver may include an RF transmitter configured to up-convert andamplify a frequency of the transmitted signal, an RF receiver configuredto low-noise-amplify the received signal and down-convert the frequency,and the like. In addition, the transceiver may be configured to receivea signal through a radio channel and output the received signal to theterminal processor 1102, and may be configured to transmit a signaloutput from the terminal processor 1102 through a radio channel. Theterminal processor 1102 may be configured to control a series ofprocesses so that the terminal 1100 may operate according to theabove-described embodiments. For example, the terminal receiver 1101 maybe configured to receive a signal including interruption indicatorinformation from the base station, and the terminal processor 1102 maybe configured to control to interpret an overlapping relationshipbetween an allocated uplink or downlink transmission/reception resourceand a resource indicated by the interruption indicator information.Thereafter, the terminal transmitter 1104 may be configured to transmitan uplink signal based on the overlapping relationship.

FIG. 12 is a block diagram of a base station 1200.

Referring to FIG. 12, the base station 1200 may include a base stationreceiver 1201, a base station transmitter 1205, and a base stationprocessor 1203. The terminal receiver 1201 and the terminal transmitter1205 may be collectively referred to as a transceiver. The transceivermay be configured to transmit or receive a signal to or from theterminal 1100. The signal may include control information and data.Accordingly, the transceiver may include an RF transmitter configured toup-convert and amplify a frequency of the transmitted signal, an RFreceiver configured to low-noise-amplify the received signal anddown-convert the frequency, and the like. In addition, the transceivermay be configured to receive a signal through a radio channel and outputthe received signal to the terminal processor 1203, and may beconfigured to transmit a signal output from the terminal processor 1203through a radio channel. The base station processor 1203 may control aseries of processes so that the base station 1200 can operate accordingto the above-described embodiments. For example, the base stationprocessor 1203 may be configured to determine a resource on which uplinkor downlink transmission/reception is not to be performed, and may beconfigured to control to generate interruption indicator information tobe transmitted to the terminal 1100. Thereafter, the base stationtransmitter 1205 may be configured to deliver the interruption indicatorto the terminal 1100, and the base station receiver 1201 may beconfigured to receive an uplink signal based on the interruptionindicator.

The embodiments disclosed in the present disclosure and the accompanyingdrawings are merely presented as examples in order to easily describethe present disclosure and facilitate understanding of the presentdisclosure but are not intended to limit the scope of the presentdisclosure. It will be apparent to those skilled in the art to which thepresent disclosure pertains that different modifications based on thetechnical idea of the present disclosure may be practiced. In addition,embodiments described herein may be combined and practiced as needed.For example, the base station and the terminal may be operated bycombining the parts of the embodiments. In addition, although thepresent disclosure is presented based on the NR system, othermodifications based on the present disclosure may be applicable to othersystems such as the FDD or the TDD LTE system.

While the present disclosure has been shown and described with referenceto certain embodiments thereof, it will be understood by those skilledin the art that various changes in form and details may be made thereinwithout departing from the scope of the present disclosure as defined bythe appended claims and their equivalents.

What is claimed is:
 1. A method performed by a terminal in a wirelesscommunication system, the method comprising: receiving, from a basestation, configuration information including a plurality of informationelements for a time-frequency region; receiving control information fromthe base station; and cancelling a transmission of physical uplinkshared channel (PUSCH) associated with a time-frequency region indicatedby the control information, wherein the time-frequency region indicatedby the control information is associated with at least one of theplurality of information elements included in the configurationinformation.